I usually try not to play more than one game on console and one on handheld at the same time, because when I start a new game while I'm playing another one it usually results in playing only one of the two after a little while.
The problem is that I am so hardly trying to follow this rule that I sometimes play nothing at all. This was the case in last december when I actually would've had a lot of time to play games, but I was in the middle of FF V and did not want to play it although I felt I have to finish it first before I start something different. So I played nothing until I started Wario Land after Christmas.